Preserve QPowerPoint strikethrough in PPTX

src/io/powerPointOffice.ts

@@ -18,6 +18,7 @@ interface SlideTextBlock {
   bold?: boolean;
   italics?: boolean;
   underline?: boolean;
+  strike?: boolean;
   color?: string;
   fontSize?: number;
   fontFamily?: string;
@@ -105,12 +106,14 @@ export async function importPptxFile(file: File): Promise<ImportedPowerPointDeck
         titleBold: slideTextBlocks[0]?.bold ?? false,
         ...(slideTextBlocks[0]?.italics ? { titleItalics: true } : {}),
         ...(slideTextBlocks[0]?.underline ? { titleUnderline: true } : {}),
+        ...(slideTextBlocks[0]?.strike ? { titleStrike: true } : {}),
         ...(slideTextBlocks[0]?.color ? { titleColor: slideTextBlocks[0].color } : {}),
         ...(slideTextBlocks[0]?.fontSize ? { titleFontSize: slideTextBlocks[0].fontSize } : {}),
         ...(slideTextBlocks[0]?.fontFamily ? { titleFontFamily: slideTextBlocks[0].fontFamily } : {}),
         ...(slideTextBlocks[1]?.bold ? { subtitleBold: true } : {}),
         ...(slideTextBlocks[1]?.italics ? { subtitleItalics: true } : {}),
         ...(slideTextBlocks[1]?.underline ? { subtitleUnderline: true } : {}),
+        ...(slideTextBlocks[1]?.strike ? { subtitleStrike: true } : {}),
         ...(slideTextBlocks[1]?.color ? { subtitleColor: slideTextBlocks[1].color } : {}),
         ...(slideTextBlocks[1]?.fontSize ? { subtitleFontSize: slideTextBlocks[1].fontSize } : {}),
         ...(slideTextBlocks[1]?.fontFamily ? { subtitleFontFamily: slideTextBlocks[1].fontFamily } : {}),
@@ -159,9 +162,11 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
     const titleBold = sourceSlide.titleBold ?? true;
     const titleItalics = Boolean(sourceSlide.titleItalics);
     const titleUnderline = Boolean(sourceSlide.titleUnderline);
+    const titleStrike = Boolean(sourceSlide.titleStrike);
     const subtitleBold = Boolean(sourceSlide.subtitleBold);
     const subtitleItalics = Boolean(sourceSlide.subtitleItalics);
     const subtitleUnderline = Boolean(sourceSlide.subtitleUnderline);
+    const subtitleStrike = Boolean(sourceSlide.subtitleStrike);
     const titleHyperlink = normalizedExternalHyperlinkTarget(sourceSlide.titleHyperlink);
     const subtitleHyperlink = normalizedExternalHyperlinkTarget(sourceSlide.subtitleHyperlink);
     const slide = pptx.addSlide();
@@ -193,6 +198,7 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
       bold: titleBold,
       italic: titleItalics,
       ...(titleUnderline ? { underline: { style: "sng" } } : {}),
+      ...(titleStrike ? { strike: "sngStrike" } : {}),
       color: titleColor,
       margin: 0.04,
       breakLine: false,
@@ -208,6 +214,7 @@ export async function exportPptxBlob(deck: ExportablePowerPointDeck): Promise<Bl
       bold: subtitleBold,
       italic: subtitleItalics,
       ...(subtitleUnderline ? { underline: { style: "sng" } } : {}),
+      ...(subtitleStrike ? { strike: "sngStrike" } : {}),
       color: subtitleColor,
       valign: "top",
       fit: "shrink",
@@ -248,6 +255,7 @@ function extractSlideTextBlocks(slideXml: unknown, hyperlinkTargets: Record<stri
       const bold = runTextBold(runProperties);
       const italics = runTextItalics(runProperties);
       const underline = runTextUnderline(runProperties);
+      const strike = runTextStrike(runProperties);
       const color = runTextColor(runProperties);
       const fontSize = runTextFontSize(runProperties);
       const fontFamily = runTextFontFamily(runProperties);
@@ -258,6 +266,7 @@ function extractSlideTextBlocks(slideXml: unknown, hyperlinkTargets: Record<stri
         bold,
         italics,
         underline,
+        strike,
         ...(color ? { color } : {}),
         ...(fontSize ? { fontSize } : {}),
         ...(fontFamily ? { fontFamily } : {})
@@ -706,6 +715,11 @@ function runTextUnderline(runProperties: Record<string, unknown>) {
   return Boolean(value && value !== "none");
 }
 
+function runTextStrike(runProperties: Record<string, unknown>) {
+  const value = stringValue(runProperties.strike ?? runProperties["@_strike"]).trim().toLowerCase();
+  return Boolean(value && value !== "nostrike");
+}
+
 function runTextFontSize(runProperties: Record<string, unknown>) {
   const rawSize = numberAttribute(runProperties, "sz");
   return rawSize ? normalizeFontSize(rawSize / 100) : undefined;